Photocatalytic Hydrogen Generation System Using a Nickel-Thiolate Hexameric Cluster
作者： Husain N. Kagalwala , Eric Gottlieb , Gao Li , Tao Li , Rongchao Jin
DOI: 10.1021/IC4013069
关键词:
摘要: We report the use of a nickel-thiolate hexameric cluster, Ni6(SC2H4Ph)12, for photocatalytic hydrogen production from water. The nickel cluster was synthesized ex-situ and characterized by various techniques. Single crystal X-ray analysis, 1H NMR, 2D COSY, ESI-MS, UV–visible spectroscopy, TGA provided insight into structure confirmed purity stability cluster. Cyclic voltammetry helped confirm evolution reaction (HER) activity this catalyst. Photoreactions carried out using an iridium photosensitizer, Ir(F-mppy)2(dtbbpy)[PF6], TEA as sacrificial reductant revealed high Ni6 water reducing High TONs (3750) TOFs (970 h–1) were obtained at optimum catalyst concentration (0.025 mM), with low concentrations yielding up to 30 000 turnovers. Quenching studies, along evidence electrochemical showed that reduction system proceeds through reductive quenching mecha...
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